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3921 LORD BYRON CIR, ROUND ROCK, TX 78664

ROUND ROCK, 78664 — williamson County

3 bed2 bath2,234 sqftBuilt 1999

Property at a Glance

This home is estimated between $325,713 and $600,533, with a best estimate of $412,774. That places the property below the R550600D - Forest Creek Sec 15,16,19,31 median of $514,276, in a neighborhood that declined 8.7% over the past year.

Estimated Value Range

$325,713 $600,533
Best Estimate
$412,774
WCAD Value
$446,901
High Confidence

Based on 5 comparable properties(5 in the same subdivision)

Based on 5 comparable properties in R550600D - Forest Creek Sec 15,16,19,31, this home's estimated market value is between $325,713 and $600,533. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

4008 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
5 bed 3 bath 2,036 sqft Built 2000
Raw Value $545,849
Adjusted Value $600,533

Adjusted +$56,649 for 198 sqft more living space and -$1,965 for being older. Net adjustment: +$54,684.

3958 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,775 sqft Built 2000
Raw Value $522,992
Adjusted Value $366,243

Adjusted -$154,784 for 541 sqft less living space and -$1,965 for being older. Net adjustment: -$156,749.

3995 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,374 sqft Built 2002
Raw Value $458,723
Adjusted Value $412,774

Adjusted -$40,055 for 140 sqft less living space and -$5,894 for being older. Net adjustment: -$45,949.

3905 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
4 bed 2 bath 2,006 sqft Built 2000
Raw Value $499,254
Adjusted Value $562,521

Adjusted +$65,232 for 228 sqft more living space and -$1,965 for being older. Net adjustment: +$63,267.

4003 LORD BYRON CIR, ROUND ROCK, TX 78664
0.00 mi 100% similar Same subdivision
3 bed 2 bath 2,861 sqft Built 2001
Raw Value $509,032
Adjusted Value $325,713

Adjusted -$179,389 for 627 sqft less living space and -$3,930 for being older. Net adjustment: -$183,319.

The Neighborhood

This home is valued 13.1% below the R550600D - Forest Creek Sec 15,16,19,31 median of $514,276. That positions it competitively for buyers comparing within the neighborhood. Note that values in this subdivision declined 8.7% over the past year.

R550600D - Forest Creek Sec 15,16,19,31

typical
274 Properties
$514,276 Median Value
-8.7% YoY Change
0% Have Pool
99% Have Garage
This Home
$446,901
Median
$514,276

This home is -13.1% below the subdivision median.

Tax Analysis

The estimated annual property tax is $8,041 across all districts. With a homestead exemption claimed, that drops to $6,708 — saving $1,333 per year. That's $559 per month a buyer should budget. The assessed value increased +1.7% vs the subdivision average of -8.7%. This above-average increase gives a protest opportunity score of 50 out of 100 — it may be worth challenging the appraisal.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$3,991
Round RockCity0.3720%$1,662
Williamson CountyCounty0.3694%$1,651
Austin Community Collegespecial0.1034%$462
Williamson County FM/RdCounty0.0443%$198
Upper Brushy Creek WCIDWater0.0170%$76
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$8,041
50 / 100

Moderate opportunity to protest.

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $412,774 would pay approximately $2,577 per month (principal and interest only, excluding taxes and insurance).

Data sourced from Williamson County Appraisal District (WCAD), Texas Education Agency (TEA), and Federal Reserve Economic Data (FRED). Assessment values reflect the appraisal district's estimate, not market sale prices. Report generated 4/18/2026.

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